28088544 has 96 divisors (see below), whose sum is σ = 81841536. Its totient is φ = 8363520.

The previous prime is 28088527. The next prime is 28088549. The reversal of 28088544 is 44588082.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28088549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70554 + ... + 70950.

It is an arithmetic number, because the mean of its divisors is an integer number (852516).

Almost surely, 2^28088544 is an apocalyptic number.

28088544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28088544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40920768).

28088544 is an abundant number, since it is smaller than the sum of its proper divisors (53752992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28088544 is a wasteful number, since it uses less digits than its factorization.

28088544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 39.

The square root of 28088544 is about 5299.8626397294. The cubic root of 28088544 is about 303.9786457761.

The spelling of 28088544 in words is "twenty-eight million, eighty-eight thousand, five hundred forty-four".